Trial on TV in birthplace of science (4,4)
I believe the answer is:
test tube
'birthplace of science' is the definition.
(I've seen this before)
'trial on tv' is the wordplay.
'trial' becomes 'test' (synonyms).
'on' says to put letters next to each other.
'tv' becomes 'tube' (I've seen this before).
'test'+'tube'='TEST-TUBE'
'in' is the link.
(Other definitions for test tube that I've seen before include "Scientist's cylindrical glass" , "Lab vessel" , "glass vessel" , "Item of laboratory equipment" , "Small glass cylinder with one end closed, used in laboratory" .)